How can you change mozilla-debian iceweasel system icons?

[Mike Hommey]

On Mon, Nov 12, 2012 at 11:34:43AM -0800, Edmund J. Biow wrote:
> Every other version of mozilla products I've ever used it was
> possible to change the icon that appears on the application and
> taskbar by replacing the ones you didn't care for with other files
> of the same name.  Depending on the app and OS the extension might
> be .ico, .xpm, .png, and the name might be something like
> default16.*, main-window16.*, messengerWindow.*, but always the
> location was in PROGRAM/chrome/icons/default.
> 
> For some reason this does not work with the /mozilla/./debian/.net
> versions of iceweasel. I also tried changing the default16.png, etc.
> icons in other locations to no effect, e.g.
> $  locate default16.png default32.png default48.png
> /usr/share/iceweasel/chrome/icons/default/default16.png
> /usr/share/iceweasel/chrome/icons/default/default32.png
> /usr/share/iceweasel/chrome/icons/default/default48.png
> /usr/share/xulrunner-1.9.1/chrome/icons/default/default16.png
> /usr/share/xulrunner-1.9.1/chrome/icons/default/default32.png
> /usr/share/xulrunner-1.9.1/chrome/icons/default/default48.png
> /usr/share/xulrunner-16.0/chrome/icons/default/default16.png
> /usr/share/xulrunner-16.0/chrome/icons/default/default32.png
> /usr/share/xulrunner-16.0/chrome/icons/default/default48.png
> 
> I really hate the default Debian ice* system icons, and have ones of
> my own that I much prefer, it irks me that I can't figure this out.
> Linux is all about choice. What am I overlooking?

/usr/share/pixmaps/iceweasel.png ?

Mike